Improvement in steam-boilers



)Umrnn-iscvAf-TES/ PATENT Orrpro 1;

GEORGE H. cORLIs's, OE PRovDENOE, RHODE IsLANDI IMPROVEMENT IN STEA'MFBQILERS.

Specification forming part of Letters Patent' No. 177,692, dated May 23, 1876; application tiled October 15, 1875.y

To all whom it may concern Be it known that I, GEORGE H. CoRLIss, of Providence, in the State of Rhode Island, have invented certain Improvements relating to Steam-Boilers, of which the following is a specification I have devised a form of boiler, and an ar-l rangement of the several parts thereof, which,

while Well adapted for generating steam and tion of blowing OE. Provision is also made by two opposite man-holes and lcovers for inserting the blow-oft' pipe and other pipes through a removable cover, while the cover opposite is left clear of any pipes or'ineumbrances, vso that it may be easily removed to allow the entrance ot' the operator to reach every portion of the interior for examination or repairs. The general style ot boiler is upright tubular. The tubes, instead of being evenly distributed, are aggregated into two clusters, one on each side of the central line, with a space between them of sufficient width for a person to work therein. Nea-r the bottom fof this space is a large open-top vessel, in-

tended to collect sediment. The current of water, as it descends, precipitates its sediment directly into the tub, While the cleaner Water ymoves out sidewise, and, descending to the bottom, becomes further heated by the tubes and crown-sheet, and -again rises to repeat its circuitous travel.

The accompanyingdrawings form part of.

this specification.

Figure l is a vertical section of the boilery and setting, in thel plane of the man-holes.

Fig. 2 is a corresponding section of the boilerV at right'angles thereto. Fig. 3 is a horizontal section through the boiler.

Referring to the drawing, A is the shell of v the boiler, constructed and applied together and equipped, except as hereafter described, in any'ordinary or suitable'manner. I t'orm two man-holes, al a2, equipped with their respective strong covers. One of the plates or covers, al, is to be rarely removed. It forms a means through which a blow-oft` pipe, feedpipe, and sundryother pipes may be connected. The other man-hole cover, a2, has no pipes, and

is ready tobe removed and replaced as often as desired. The tubes are arranged in sets, Bl B2, leaving a space, G, between them. Near the bottom of the space O is a cast-iron tub, I), of the form represented, and adapted to receive mud. Stays c are rmly riveted or otherwise secured to the inner face of the tub, and extend up to crowsfeet or other suitable fastenings in the top plate of the boiler. I prefer, as shown, to make the top plate of castiron, with deep Webs, and to secure the stays or braces c to those webs, Below the tub the bottom plate of the boiler is stayed at a proper distance from the tub by means of thimblesand rivets, or by means of threaded stays simila'r to those used in setting the fire-boxes in locomotives. G is a blow-off pipe, controlled by a suitable cock. It enters through the plate al and bends downward, terminating within and near the `bottom oi' the -mnd-tub D.

After the boiler has been used a while the stopcock on the blow-off pipe is opened anda quantity ot' the water is blown out. The Water thus taken comes from theinside of the tub D, near the bottom. It' mud is accumulated in the tub some mud is thus blown out, and after the clear water comes a further quantity ot'V mud ,is likely to be stirred up and blown out by free access is thereby attained for the operalto'" to enter the boiler and place his feet in the tub D. He can then examine the tubes,'jthe stays, Snc., and make any repairs or alterations v Y of these parts,or of the blow-off pipe or other parts. f

My boiler may be as efficiently stayed longitudinally as any other. The tubes braeethe rportions where they are placed, and the rivets and thimbles below the tub D, and the stays c above the tub, as shown, give a very efficient support to both entire ends of the boiler.j

I claim as my invention- 1. The two series of tubes B1 B2, with the open space C between them, in combination with the man-holes a1 a2, as and for the purpose specied.

2. The mnd-tub D, arranged in the open. space C between the sets of tubes, as Vvherein n specified.

3. The rigid mnd-tub D, in combination with a series of stays connecting therefrom tothe bottom of the boiler, and with a series of stays i extending from the sides of the tub to a. point in the top plate ofthe boiler, vsubstantiallyasv and for the purposes herein specified.

vmy hand this 6th day of October, 1875, in the presence of two subscribing witnesses.

GEO. ELOORLISS.

vWitnesses:

GEORGE G. PHILLIPS, ED. W. RAYNSFORD. 

